Eduaed ullrich



UNITED STATES PATENT OFF CE.

EDUARD ULLRICH, OF HOOHST-ON-THE-MAIN, GERMANY, ASSIGNOR TO THE FARBWVERKE, VORMALS MEISTER, LUCIUS & BRUNING, OF SAME PLACE.

BLUE COLORING-MATTER FORMED FROM PARANlTROSO-METHYLDIPHENYLAMINE ON PHENOLS R OXYCARBONIC ACIDS.

SPECIFICATION" forming part of Letters Patent No. 366,357, dated July 12, 1887.

Application filed March 16, 1887. Serial No. 231,144. (No specimens.)

of a blue coloring-matter or dye-stuff by the action ofparanitrosdmethyldiphenylamine on phenols or oxycarbonic acids.

In carrying out my invention I proceed as follows; The paranitroso-methyldiphenylamine N (111 OGERNO is prepared from methyldih nyla 1ine,NOH, which for this purpose is dissolved in a suitable dissolving agent, such as alcohol or glacial acetic acid, towhichhas been added some concentrated hydrochloric acid, or into which hydrochloricacid gas has been allowed to flow.

Example: Nineteen parts of lnethyldiphenylamine is dissolved in sixty-seven parts ofglacial acetic acid, into which about twelve 0 parts of hydrochloric-acid gas has been allowed to flow. Afterward is added,slowly and while cooling well, seven parts of nitrite,previously dissolved in ten parts of water. To the nit-roso compound thus obtained is added thirty-eight parts of gallic acid, and the solu- 5 tion heated in a water bath until it has taken a blue coloring. Now the mass is poured into water neutralized by caustic soda and the coloringmatter formed filtered ofi from the liquid. 0

The coloring-matter is in form of a darkblue paste, insoluble in cold water, and with difficulty soluble in hot water. In dyeing, as well as in printing, it is fixed on the fiber by means of chrome or iron mordants, with the 5 addition of acetate of lime.

\Vhatl claim as new, and-desire to secure by Letters Patent. is

As a new manufacture, the blue coloringmatter or dye-stuff prepared by the action of paranitroso-inethyldiphenylamine on phenols or oXycarbonic acids, substantially as described;

In testimony whereof I affix my signature in presence of two witnesses.

' EDUARD ULLRIGH.

Witnesscs:

ALVESTO S. HOGUE, JEAN GRUND. 

